Glow plug controller

[Batsford]

Does the kx040-4 have a glow plug controller And if so where is it located?

 

[North Idaho Wolfman]

I don't think it does, I do believe the ECU controls it.

 

[Batsford]

I don't think it does, I do believe the ECU controls it.

Thanks, that’s what I was worried about. My glow plugs aren’t staying on long enough to start the machine. (New glow plugs and 11.5 volts to them)

 

[GreensvilleJay]

yeesh ,if the ECU is involved, maybe there's an 'ambient temperature sensor' AND a 'water temperature sensor' that have to 'play nice' to get the engine to start ?

 

[North Idaho Wolfman]

Thanks, that’s what I was worried about. My glow plugs aren’t staying on long enough to start the machine. (New glow plugs and 11.5 volts to them)

Get the WSM and it might be able to walk you through troubleshooting the issue.

 

[Dave_eng]

Thanks, that’s what I was worried about. My glow plugs aren’t staying on long enough to start the machine. (New glow plugs and 11.5 volts to them)

I bought A KX040-4 this year before and concluding the sale I discussed cold weather starting with the dealership owner. I have a M7040 and learned of a trick to bypass the GP controller which made a major difference in starting when I had my block heater plugged in. Regarding the excavator, the owner told me when it is cold you may need to repeat the key off, key on process a couple of times to get enough heat from the GP's
Try this and let us know.
Dave

 

[Batsford]

I bought A KX040-4 this year before and concluding the sale I discussed cold weather starting with the dealership owner. I have a M7040 and learned of a trick to bypass the GP controller which made a major difference in starting when I had my block heater plugged in. Regarding the excavator, the owner told me when it is cold you may need to repeat the key off, key on process a couple of times to get enough heat from the GP's
Try this and let us know.
Dave

I’ll give that another try…..there is a temperature sensor near the thermostat that I’m going to check out as well. Thanks

 

[Batsford]

yeesh ,if the ECU is involved, maybe there's an 'ambient temperature sensor' AND a 'water temperature sensor' that have to 'play nice' to get the engine to start ?

Yes there is a water temp sensor I’m going to check out. Thanks

 

[Batsford]

Get the WSM and it might be able to walk you through troubleshooting the issue.

Yes, I just down loaded one…..looks like it get into the A/C unit more than anything else!

 

[GreensvilleJay]

Since you've replaced all the plugs, have good voltage and the machine runs, so unlikely the ECU.
Hopefully the WSM has the specs for that water sensor, how to test and maybe what temperature the ECU looks at to control the glow plugs, and HOW the ECU actually controls the power to glowplugs.
If, say the ECU reads the sensor as 'warm' when it's actually 'cold', then the ECU probably won't heat the glow plugs as much and that could cause 'hard starting'. Maybe check the wiring from sensor to ECU.
Most electrical problems are a series of 'test and eliminate, next' but you need the WSM/ wiring diagram, and you've got that. Check WSM for a 'trouble shooting check list' ?

 

[Russell King]

Thanks, that’s what I was worried about. My glow plugs aren’t staying on long enough to start the machine. (New glow plugs and 11.5 volts to them)

Do you have any block heater installed? (Is the water in the engine being warmed by any method? is a better direct question really)